Mass is the enemy of performance so we pulled out all the stops to make the Roval Alpinist Seatpost the lightest post weve ever seen that passes our standards. At 136 grams (27.2mm x 300mm) its about as light as youll find. Not only does light weight make for faster climbing it also improves acceleration and ride quality. The Alpinist 2-bolt micro-adjust clamp with extended saddle cradle ensures precision fit and secure retention. Available in two sizes 27.2mm x 300mm and 27.2mm x 360mm each with a 12mm setback. And because they are backed by a no-fault crash replacement policy and lifetime warranty you can rest easy knowing that weve got your back.